package com.hundsun.network.uc.common;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by zhengkk19738 on 2018/5/2.
 */
public class EWCodeUtil {
    private static final int BLACK = 0Xff000000;
    private static final int WHITE = 0xffffffff;

    public EWCodeUtil() {

    }

    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, (matrix.get(x, y) ? BLACK : WHITE));
            }
        }
        return image;
    }

    /**
     * @param matrix 字节阵列
     * @param format 图片格式
     * @param file   图片文件(传入文件名称，路径)
     * @throws IOException
     */
    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, file)) {
            throw new IOException("Could not write an image of format " + format + " to " + file);
        }
    }

    /**
     * @param matrix 字节阵列
     * @param format 图片格式
     * @param stream 图片文件流
     * @throws IOException
     */
    public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, stream)) {
            throw new IOException("Could not write an image of format " + format);
        }
    }

    public static void main(String[] args) {
        try {
            String content = "http://jingyan.baidu.com/article/915fc4149e1f9a51394b2007.html";

            // String path = "D:";
            String path = "D:/";
            MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
            Map<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
            // 内容所使用编码(有中文则必须指定编码)
            hints.put(EncodeHintType.CHARACTER_SET, "UTF8");
            BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 200, 200, hints);
            // 生成二维码
            File outputFile = new File(path, "张颖辉.jpg");
            EWCodeUtil.writeToFile(bitMatrix, "jpg", outputFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
